US4450901A - Heat recovery attachment for a heating apparatus - Google Patents

Heat recovery attachment for a heating apparatus Download PDF

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Publication number
US4450901A
US4450901A US06/340,048 US34004882A US4450901A US 4450901 A US4450901 A US 4450901A US 34004882 A US34004882 A US 34004882A US 4450901 A US4450901 A US 4450901A
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US
United States
Prior art keywords
discharge duct
heat exchanger
combustion gases
dimension
outlet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US06/340,048
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English (en)
Inventor
Norbert G. L. M. Janssen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEOM BV SITTARD BROEKSITTARDERWEG 41 A CORP OF NETHERLANDS
Stamicarbon BV
Original Assignee
Stamicarbon BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Stamicarbon BV filed Critical Stamicarbon BV
Assigned to NEOM B.V., SITTARD, THE BROEKSITTARDERWEG 41, A CORP. OF THE NETHERLANDS reassignment NEOM B.V., SITTARD, THE BROEKSITTARDERWEG 41, A CORP. OF THE NETHERLANDS ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: JANSSEN, NORBERT G. L. M.
Application granted granted Critical
Publication of US4450901A publication Critical patent/US4450901A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L17/00—Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues
    • F23L17/005—Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues using fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001—Recuperative heat exchangers
    • F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/30—Technologies for a more efficient combustion or heat usage
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S165/00—Heat exchange
    • Y10S165/901—Heat savers

Definitions

  • This invention relates to a novel complementary device that can be incorporated in a combustion gas discharge duct of a gas-fired or oil-fired heating apparatus utilizing a liquid or air circuit as the heat exchanging medium.
  • the present invention comprises in combination a heat exchanger having supply and discharge connections for the passage of combustion gases from a combustion gas discharge duct, a fan to force a substantial portion of the combustion gas to flow through the heat exchanger between the supply and discharge connections, and baffle means disposed at the discharge connection for providing a barrier to substantially prevent the discharge gases from totally bypassing the heat exchanger thereby permitting the increased extraction of heat energy therefrom.
  • the term "complementary device” is used to describe a device that can be utilized in combination with a heating apparatus having a liquid or an air circuit so that more energy can be extracted from the combustion gases to the liquid or the air circuit being heated.
  • This type of an economizer can be provided separately in the combustion gas discharge line, or it can also be integrated with the heating apparatus.
  • An object of the present invention is to eliminate the above-mentioned disadvantages and to provide a complementary device for a heating apparatus in which the combustion gases can be discharged through the combustion gas discharge duct when the fan does not function, or functions inadequately, without requiring the necessity of additional safety precautions.
  • the device according to the present invention can be used in conjunction with a heating apparatus with or without a draft interruptor/downdraft deflector.
  • means are thus provided in which, if the fan is operating, substantially all of the flow of combustion gases are forced to pass through the heat exchanger to be subsequently directed to the combustion gas discharge duct downstream thereof, yet by which, if the fan is not operating or operating inadequately, the combustion gases are directed, at least in part, directly through the combustion gas discharge duct thereby substantially bypassing the heat exchanger.
  • the heat exchanger only partially extends into the combustion gas discharge duct, and means are provided by which the combustion gases, after passing through the heat exchanger, can be directed into the combustion gas discharge duct at an upward angle so that they form a gas barrier, extending substantially across the transverse section of the combustion gas discharge duct.
  • This gas barrier thus forms a type of closed aerodynamic valve when the fan is properly operating which diverts substantially all combustion gases upstream thereof through the heat exchanger.
  • exit gases The portion of combustion gases which exit the heat exchanger (hereinafter "exit gases") into the combustion gas discharge duct are thus directed at an angle so that these exit gases are led obliquely upwards into the discharge duct in the general direction of flow of the combustion gases normally through the discharge duct.
  • a sealing combustion gas barrier is established at the place where the exit gases enter the combustion gas discharge duct when the fan is properly operating. It is thus achieved that the portion of combustion gases that is not in the first instance diverted into the opening of the heat exchanger is prevented from completely bypassing the heat exchanger by virtue of the exit gas barrier, so that such portion will eventually be subsequently forced to flow through the heat exchanger thereby saving its associated heat energy.
  • the angle of exit gas discharged relative to the central axis of the combustion gas discharge duct and the general flow of combustion gases therethrough is between about 40° and about 70°, preferably between 50° and 60°.
  • angular discharge is provided by an inclined guide baffle positioned near the outlet opening.
  • This guide baffle may extend partly into the combustion gas discharge duct a distance, as measured perpendicular to the central axis of the duct, for example, of about 0.25-0.50 times the inner diameter of the combustion discharge duct.
  • the dimension of the guide baffle as measured in a direction generally parallel to the central axis of the combustion gas discharge duct is less than the corresponding dimension of the outlet opening.
  • the exit gases from the heat exchanger are directed into a closed chamber substantially surrounding the combustion gas discharge duct thereby forming a type of annulus structure.
  • the wall of the combustion gas discharge duct is locally provided with apertures along substantially the entire circumference and optionally, along the height of the chamber, so that the combustion gases are directed obliquely upwards into the combustion gas discharge duct.
  • the oblique inflow of the combustion gases through the apertures in the combustion gas discharge duct may be accomplished by utilizing strips placed obliquely at the positions of the apertures. These strips may be relatively simply provided by making incisions locally at the apertures along three sides and pressing the strips thus formed inward at an angle.
  • the heat exchanger is not positioned in the discharge duct more than at most a distance equal to half the inner diameter of the discharge duct.
  • FIG. 1 is an elevational cross-sectional view of the heating apparatus mounted to a portion of discharge duct;
  • FIG. 2 is a plan view in section taken along the line a--a in FIG. 1;
  • FIG. 3 is a partial cross-sectional view of a baffle according to the present invention.
  • the heat exchanger 1 as shown in FIG. 1 is basically conventional in design as described in the non-prepublished Dutch patent application No. 7906088. Referring to FIGS. 1 and 2, the heat exchanger 1 having side 2 is mounted to the combustion gas discharge duct 3 at a predetermined position.
  • the supply and discharge for the circulating liquid in the heat exchanger circuit are indicated by 4 and 5, respectively.
  • the conduits in the heat exchanger 1 through which the liquid flows from supply 4 to discharge 5 are indicated by 6 and 7, respectively.
  • Side 2 of the heat exchanger 1 does not extend, or extends only partially, into discharge duct 3 so that a relatively large local area of duct 3 remains unobstructed.
  • Combustion gases are drawn from the combustion gas discharge duct into the heat exchanger 1 via inlet opening 9 by virtue of fan 8. These gases then flow through the heat exchanger 1 to the fan 8, as indicated by arrows b thereby permitting transfer of heat energy from the combustion gas to the liquid flowing in conduits 6 and 7.
  • the gases are then directed into the combustion gas discharge duct 3 through connection 10 having passage 11 and guide baffle 12 extended into duct 3. These combustion gases which are directed back into the discharge duct will necessarily be at a lower temperature than those gases which initially enter the heat exchanger 1 through inlet opening 9.
  • the combustion gases which reenter the discharge duct after the heat exchanging process will hereinafter be referred to as exit gases while that portion of combustion gases which initially enter the heat exchanger 1 will be referred to as inlet gases.
  • the performance curve of fan 8 should be as steep as possible and sized to accept the capacity (e.g. maximum pressure gas displacement volume) of the heating apparatus.
  • a steep performance curve is desirable to avoid the heating apparatus operating dependently to an impermissible extent on incidental circumstances, such as downdrafts or obstructions in the combustion gas discharge duct, for example, obstructions due to fouling.
  • guide baffle 12 is disposed at an angle so that the exit gases are obliquely directed upwards into the combustion gas discharge duct 3 relative to the general direction of flow of discharge gases through the duct 3 (noted generally by arrow c). Due to the inclined position of guide baffle 12, exit gases are angularly directed into the combustion gas discharge duct 3, strike the opposite wall of the duct, and are subsequently deflected in the direction of discharge gas flow (arrow c) through duct 3. A portion of the exit gases is directed into the combustion gas discharge duct 3 at an angle of about 90° relative to the central axis of the duct as indicated generally by arrows d.
  • the angle that baffle 12 forms relative to the central axis of duct 3 is between about 40° and about 70°, preferably between about 50° and about 60°.
  • Baffle 12 extends partly into the combustion gas discharge duct.
  • the horizontal projection of this baffle 12 is preferably equal to about 0.25 to about 0.50 times the inner diameter of the combustion gas discharge duct 3.
  • the dimension L1 of baffle 12 as measured parallel to the central axis of duct 3 should be less than dimension L2 of outlet opening 11 as similarly measured.
  • dimension L2 should be in the range of about 1.1 to about 1.5 times greater than dimension L2, and more preferably in the range between about 1.20 to about 1.35 times greater than dimension L2.
  • the area of opening 11 and the fan capacity are such that the exit gases from the heat exchanger 1 flow into the combustion gas discharge duct 3 with a velocity of between about 8 to 12 meters per second (m/s).
  • the condensate which may form in heat exchanger 1 is continuously drained via opening 13, and similarly, the condensate which may form in combustion gas discharge duct 3 is drained via opening 14. Both openings 13 and 14, may be interconnected to a joint discharge line via a water lock (not shown).
  • fan 8 is located after the heat exchanger when viewed in the direction of flow of the combustion gases. However, it is also possible to place fan 8 before the heat exchanger without impairing the beneficial effects of the present invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Chimneys And Flues (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
  • Constitution Of High-Frequency Heating (AREA)
  • General Induction Heating (AREA)
US06/340,048 1981-01-16 1982-01-18 Heat recovery attachment for a heating apparatus Expired - Fee Related US4450901A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8100182A NL8100182A (nl) 1981-01-16 1981-01-16 Complementeringsinrichting voor een verwarmingsinstallatie.
NL8100182 1981-01-16

Publications (1)

Publication Number Publication Date
US4450901A true US4450901A (en) 1984-05-29

Family

ID=19836872

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/340,048 Expired - Fee Related US4450901A (en) 1981-01-16 1982-01-18 Heat recovery attachment for a heating apparatus

Country Status (8)

Country Link
US (1) US4450901A (de)
EP (1) EP0056670B1 (de)
AT (1) ATE21762T1 (de)
CA (1) CA1174923A (de)
DE (1) DE3272785D1 (de)
DK (1) DK17782A (de)
NL (1) NL8100182A (de)
NO (1) NO820127L (de)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060240369A1 (en) * 2005-04-26 2006-10-26 Heat Recovery Systems, Llc Waste heat recovery system
US20060240368A1 (en) * 2005-04-26 2006-10-26 Heat Recovery Systems, Llc Gas induction bustle for use with a flare or exhaust stack
US20100176042A1 (en) * 2007-03-13 2010-07-15 Duesel Jr Bernard F Wastewater Concentrator
US20110061816A1 (en) * 2007-03-13 2011-03-17 Heartland Technology Partners Llc Compact wastewater concentrator using waste heat
US20110083556A1 (en) * 2007-03-13 2011-04-14 Heartland Technology Partners Compact wastewater concentrator and pollutant scrubber
US20110100924A1 (en) * 2007-03-13 2011-05-05 Heartland Technology Partners Llc Compact Wastewater Concentrator and Contaminant Scrubber
US8585869B1 (en) 2013-02-07 2013-11-19 Heartland Technology Partners Llc Multi-stage wastewater treatment system
US8721771B2 (en) 2011-01-21 2014-05-13 Heartland Technology Partners Llc Condensation plume mitigation system for exhaust stacks
US8741100B2 (en) 2007-03-13 2014-06-03 Heartland Technology Partners Llc Liquid concentrator
US8741101B2 (en) 2012-07-13 2014-06-03 Heartland Technology Partners Llc Liquid concentrator
US8808497B2 (en) 2012-03-23 2014-08-19 Heartland Technology Partners Llc Fluid evaporator for an open fluid reservoir
US9199861B2 (en) 2013-02-07 2015-12-01 Heartland Technology Partners Llc Wastewater processing systems for power plants and other industrial sources
US9296624B2 (en) 2011-10-11 2016-03-29 Heartland Technology Partners Llc Portable compact wastewater concentrator
US20160187026A1 (en) * 2014-03-06 2016-06-30 Jeong Sub KIM Heater for indoor warming using waste heat of exhaust gas
US9808738B2 (en) 2007-03-13 2017-11-07 Heartland Water Technology, Inc. Compact wastewater concentrator using waste heat
US10005678B2 (en) 2007-03-13 2018-06-26 Heartland Technology Partners Llc Method of cleaning a compact wastewater concentrator
US12172101B2 (en) 2019-05-31 2024-12-24 Heartland Technology Partners Llc Harmful substance removal system and method

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1183737B (it) * 1984-02-15 1987-10-22 Silvano Cappi Abbattitore di fumi per gruppi bruciatore-caldaia a combustibile gassoso o liquido
CN117870016B (zh) * 2024-03-13 2024-06-11 梁山恒源热力有限公司 基于物联网的供热系统实时监控方法及系统

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1500838A (en) * 1924-07-08 Heating attachment for stove or furnace pipes
US2077599A (en) * 1936-11-18 1937-04-20 Nathaniel B Wales Heating system
US2276400A (en) * 1942-03-17 hubbard
US3813039A (en) * 1973-03-26 1974-05-28 G Wells Heat exchanger
US4012191A (en) * 1975-06-18 1977-03-15 Foster Wheeler Energy Corporation System for recovering heat from the exhaust gases of a heat generator
US4117883A (en) * 1976-08-30 1978-10-03 Feldmann William F Heat retriever
US4185685A (en) * 1978-01-03 1980-01-29 Giberson Elwood C Waste heat recovery system and method
NL7907138A (nl) * 1979-09-26 1981-03-30 Neom Bv Werkwijze en inrichting voor het bedrijven van een c.v.-installatie.
US4331199A (en) * 1979-08-09 1982-05-25 B.V. Interpower Apparatus for recovering energy from a heating installation

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2690720A (en) * 1950-04-24 1954-10-05 Delbert H Henderson Dehydrating incinerator
DE2656544A1 (de) * 1976-12-14 1978-06-15 Rosenkranz Gustav Waermeaustauscher
US4147303A (en) * 1977-04-29 1979-04-03 Anthony Talucci Heat-saving smoke pipe attachment
DE2817450A1 (de) * 1978-04-21 1979-08-16 Wolfgang Graffius Radialgeblaese zum einbau in einen schornstein zur beschleunigung der rauchgase
GB2025599A (en) * 1978-05-04 1980-01-23 Long P W Waste-heat recovery method and apparatus
US4217877A (en) * 1978-09-27 1980-08-19 Uhlyarik Emanuel J Energy-saving forced-air furnace
US4194488A (en) * 1978-09-27 1980-03-25 William W. Weaver Home heating system

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1500838A (en) * 1924-07-08 Heating attachment for stove or furnace pipes
US2276400A (en) * 1942-03-17 hubbard
US2077599A (en) * 1936-11-18 1937-04-20 Nathaniel B Wales Heating system
US3813039A (en) * 1973-03-26 1974-05-28 G Wells Heat exchanger
US4012191A (en) * 1975-06-18 1977-03-15 Foster Wheeler Energy Corporation System for recovering heat from the exhaust gases of a heat generator
US4117883A (en) * 1976-08-30 1978-10-03 Feldmann William F Heat retriever
US4185685A (en) * 1978-01-03 1980-01-29 Giberson Elwood C Waste heat recovery system and method
US4331199A (en) * 1979-08-09 1982-05-25 B.V. Interpower Apparatus for recovering energy from a heating installation
NL7907138A (nl) * 1979-09-26 1981-03-30 Neom Bv Werkwijze en inrichting voor het bedrijven van een c.v.-installatie.

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8172565B2 (en) 2005-04-26 2012-05-08 Heartland Technology Partners Llc Gas induction bustle for use with a flare or exhaust stack
US20060240368A1 (en) * 2005-04-26 2006-10-26 Heat Recovery Systems, Llc Gas induction bustle for use with a flare or exhaust stack
US7442035B2 (en) 2005-04-26 2008-10-28 Gei Development, Llc Gas induction bustle for use with a flare or exhaust stack
US20090053659A1 (en) * 2005-04-26 2009-02-26 Gei Development Llc Gas induction bustle for use with a flare or exhaust stack
US20060240369A1 (en) * 2005-04-26 2006-10-26 Heat Recovery Systems, Llc Waste heat recovery system
US8459984B2 (en) 2005-04-26 2013-06-11 Heartland Technology Partners Llc Waste heat recovery system
US8801897B2 (en) 2007-03-13 2014-08-12 Heartland Technology Partners Llc Compact wastewater concentrator and contaminant scrubber
US10005678B2 (en) 2007-03-13 2018-06-26 Heartland Technology Partners Llc Method of cleaning a compact wastewater concentrator
US20110083556A1 (en) * 2007-03-13 2011-04-14 Heartland Technology Partners Compact wastewater concentrator and pollutant scrubber
US20110061816A1 (en) * 2007-03-13 2011-03-17 Heartland Technology Partners Llc Compact wastewater concentrator using waste heat
US11376520B2 (en) 2007-03-13 2022-07-05 Heartland Water Technology, Inc. Compact wastewater concentrator using waste heat
US8679291B2 (en) 2007-03-13 2014-03-25 Heartland Technology Partners Llc Compact wastewater concentrator using waste heat
US10946301B2 (en) 2007-03-13 2021-03-16 Heartland Technology Partners Llc Compact wastewater concentrator using waste heat
US8741100B2 (en) 2007-03-13 2014-06-03 Heartland Technology Partners Llc Liquid concentrator
US10596481B2 (en) 2007-03-13 2020-03-24 Heartland Technology Partners Llc Compact wastewater concentrator using waste heat
US8790496B2 (en) 2007-03-13 2014-07-29 Heartland Technology Partners Llc Compact wastewater concentrator and pollutant scrubber
US20100176042A1 (en) * 2007-03-13 2010-07-15 Duesel Jr Bernard F Wastewater Concentrator
US10179297B2 (en) 2007-03-13 2019-01-15 Heartland Technology Partners Llc Compact wastewater concentrator using waste heat
US20110100924A1 (en) * 2007-03-13 2011-05-05 Heartland Technology Partners Llc Compact Wastewater Concentrator and Contaminant Scrubber
US9926215B2 (en) 2007-03-13 2018-03-27 Heartland Technology Partners Llc Compact wastewater concentrator and pollutant scrubber
US9808738B2 (en) 2007-03-13 2017-11-07 Heartland Water Technology, Inc. Compact wastewater concentrator using waste heat
US9617168B2 (en) 2007-03-13 2017-04-11 Heartland Technology Partners Llc Compact wastewater concentrator using waste heat
US8721771B2 (en) 2011-01-21 2014-05-13 Heartland Technology Partners Llc Condensation plume mitigation system for exhaust stacks
US9296624B2 (en) 2011-10-11 2016-03-29 Heartland Technology Partners Llc Portable compact wastewater concentrator
US9943774B2 (en) 2012-03-23 2018-04-17 Heartland Technology Partners Llc Fluid evaporator for an open fluid reservoir
US8808497B2 (en) 2012-03-23 2014-08-19 Heartland Technology Partners Llc Fluid evaporator for an open fluid reservoir
US8741101B2 (en) 2012-07-13 2014-06-03 Heartland Technology Partners Llc Liquid concentrator
US9199861B2 (en) 2013-02-07 2015-12-01 Heartland Technology Partners Llc Wastewater processing systems for power plants and other industrial sources
US8585869B1 (en) 2013-02-07 2013-11-19 Heartland Technology Partners Llc Multi-stage wastewater treatment system
US20160187026A1 (en) * 2014-03-06 2016-06-30 Jeong Sub KIM Heater for indoor warming using waste heat of exhaust gas
US10126016B2 (en) * 2014-03-06 2018-11-13 Jeong Sub KIM Heater for indoor warming using waste heat of exhaust gas
US12172101B2 (en) 2019-05-31 2024-12-24 Heartland Technology Partners Llc Harmful substance removal system and method

Also Published As

Publication number Publication date
CA1174923A (en) 1984-09-25
ATE21762T1 (de) 1986-09-15
EP0056670B1 (de) 1986-08-27
DE3272785D1 (en) 1986-10-02
NL8100182A (nl) 1982-08-16
NO820127L (no) 1982-07-19
EP0056670A3 (en) 1983-02-09
EP0056670A2 (de) 1982-07-28
DK17782A (da) 1982-07-17

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AS Assignment

Owner name: NEOM B.V., SITTARD, THE NETHERLANDS BROEKSITTARDER

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:JANSSEN, NORBERT G. L. M.;REEL/FRAME:004197/0028

Effective date: 19820107

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REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362

FP Lapsed due to failure to pay maintenance fee

Effective date: 19880529